c++ - invalid types 'float*[float]' for array subscript -

    #include <iostream>     using namespace std;     float n;     float fact(float m)     {     float prod=1;     while(m>1)      {        prod*=m;       m--;      }     return prod;     }     ////////////////////////////////     float min(float b[],float n)     { float small=999999999999;     for(float f=0;f<n;f++)         if(b[f]<small)             small=b[f];     return small;     }     /////////////////////////////////     float max(float a[],float n)     { float small=-999999999999;        for(float i=0;i<n;i++)         if(a[i]>small)             small=a[i];       return small;     }     //////////////////////////////////////     float sum(float a[],float n)     {float sum=0;     for(float i=0;i<n;++i)     sum+=a[i];     return sum;     }      int main() {     float t,q2,count=0;          scanf("%d",t);     float *n=new float[t];     float *m=new float[t];     float *q=new float[t];     float *k=new float[t];     for(float p=0;p<t;++p)     {cin>>n[i]>>m[i]>>q[i]>>k[i];}     for(float p=0;p<t;++p)     {        float *a=new float[n[p]];      for(float i=0;i<n[p];++i)      a[i]=i+1;      for(float i=n[p];i<=m[p];++i)     {a[n[p]-1]=n[p];      for(float i=0;i<k[p];++i)     {     for(float i=0;i<n[p];++i)     a[i]=min(a,n[p])+sum(a,n[p])-a[i];//important     }      q2=max(a,n[p])-min(a,n[p]);     if(q2==q[p])     {count++;     }     }     cout<<count*fact(n,n[p]);      }   return 0;     } 

can please tell me mistakes? following errors noted! think if solved 1 , throughout

        prog.cpp:16: error: integer constant large 'long' type         prog.cpp:24: error: integer constant large 'long' type         prog.cpp: in function 'float min(float*, float)':         prog.cpp:18: error: invalid types 'float*[float]' array subscript         prog.cpp:19: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'float max(float*, float)':         prog.cpp:26: error: invalid types 'float*[float]' array subscript         prog.cpp:27: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'float sum(float*, float)':         prog.cpp:34: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'int main()':         prog.cpp:42: error: expression in new-declarator must have integral or enumeration type         prog.cpp:43: error: expression in new-declarator must have integral or enumeration type         prog.cpp:44: error: expression in new-declarator must have integral or enumeration type         prog.cpp:45: error: expression in new-declarator must have integral or enumeration type         prog.cpp:47: error: 'i' not declared in scope         prog.cpp:50: error: invalid types 'float*[float]' array subscript         prog.cpp:52: error: invalid types 'float*[float]' array subscript         prog.cpp:53: error: invalid types 'float*[float]' array subscript         prog.cpp:55: error: invalid types 'float*[float]' array subscript         prog.cpp:55: error: invalid types 'float*[float]' array subscript         prog.cpp:56: error: invalid types 'float*[float]' array subscript         prog.cpp:56: error: invalid types 'float*[float]' array subscript         prog.cpp:58: error: invalid types 'float*[float]' array subscript         prog.cpp:60: error: invalid types 'float*[float]' array subscript         prog.cpp:61: error: invalid types 'float*[float]' array subscript         prog.cpp:61: error: invalid types 'float*[float]' array subscript         prog.cpp:61: error: invalid types 'float*[float]' array subscript         prog.cpp:61: error: invalid types 'float*[float]' array subscript         prog.cpp:64: error: invalid types 'float*[float]' array subscript         prog.cpp:64: error: invalid types 'float*[float]' array subscript         prog.cpp:65: error: invalid types 'float*[float]' array subscript         prog.cpp:69: error: invalid types 'float*[float]' array subscript          compilation error    time: 0 memory: 0 signal:0         prog.cpp:16: error: integer constant large 'long' type         prog.cpp:24: error: integer constant large 'long' type         prog.cpp: in function 'float min(float*, float)':         prog.cpp:18: error: invalid types 'float*[float]' array subscript         prog.cpp:19: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'float max(float*, float)':         prog.cpp:26: error: invalid types 'float*[float]' array subscript         prog.cpp:27: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'float sum(float*, float)':         prog.cpp:34: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'int main()':         prog.cpp:42: error: expression in new-declarator must have integral or enumeration type         prog.cpp:43: error: expression in new-declarator must have integral or enumeration type         prog.cpp:44: error: expression in new-declarator must have integral or enumeration type         prog.cpp:45: error: expression in new-declarator must have integral or enumeration type         prog.cpp:47: error: 'i' not declared in scope         prog.cpp:50: error: invalid types 'float*[float]' array subscript         prog.cpp:52: error: invalid types 'float*[float]' array subscript         prog.cpp:53: error: invalid types 'float*[float]' array subscript         prog.cpp:55: error: invalid types 'float*[float]' array subscript         prog.cpp:55: error: invalid types 'float*[float]' array subscript         prog.cpp:56: error: invalid types 'float*[float]' array subscript         prog.cpp:56: error: invalid types 'float*[float]' array subscript         prog.cpp:58: error: invalid types 'float*[float]' array subscript         prog.cpp:60: error: invalid types 'float*[float]' array subscript         prog.cpp:61: error: invalid types 'float*[float]' array subscript         prog.cpp:61: error: invalid types 'float*[float]' array subscript         prog.cpp:61: error: invalid types 'float*[float]' array subscript         prog.cpp:61: error: invalid types 'float*[float]' array subscript         prog.cpp:64: error: invalid types 'float*[float]' array subscript         prog.cpp:64: error: invalid types 'float*[float]' array subscript         prog.cpp:65: error: invalid types 'float*[float]' array subscript         prog.cpp:69: error: invalid types 'float*[float]' array subscript          compilation error    time: 0 memory: 0 signal:0         prog.cpp:16: error: integer constant large 'long' type         prog.cpp:24: error: integer constant large 'long' type         prog.cpp: in function 'float min(float*, float)':         prog.cpp:18: error: invalid types 'float*[float]' array subscript         prog.cpp:19: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'float max(float*, float)':         prog.cpp:26: error: invalid types 'float*[float]' array subscript         prog.cpp:27: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'float sum(float*, float)':         prog.cpp:34: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'int main()':         prog.cpp:42: error: expression in new-declarator must have integral or enumeration type         prog.cpp:43: error: expression in new-declarator must have integral or enumeration type         prog.cpp:44: error: expression in new-declarator must have integral or enumeration type         prog.cpp:45: error: expression in new-declarator must have integral or enumeration type         prog.cpp:47: error: 'i' not declared in scope         prog.cpp:50: error: invalid types 'float*[float]' array subscript         prog.cpp:52: error: invalid types 'float*[float]' array subscript         prog.cpp:53: error: invalid types 'float*[float]' array subscript         prog.cpp:55: error: invalid types 'float*[float]' array subscript         prog.cpp:55: error: invalid types 'float*[float]' array subscript         prog.cpp:56: error: invalid types 'float*[float]' array subscript         prog.cpp:56: error: invalid types 'float*[float]' array subscript         prog.cpp:58: error: invalid types 'float*[float]' array subscript         prog.cpp:60: error: invalid types 'float*[float]' array subscript         prog.cpp:61: error: invalid types 'float*[float]' array subscript         prog.cpp:61: error: invalid types 'float*[float]' array subscript         prog.cpp:61: error: invalid types 'float*[float]' array subscript         prog.cpp:61: error: invalid types 'float*[float]' array subscript         prog.cpp:64: error: invalid types 'float*[float]' array subscript         prog.cpp:64: error: invalid types 'float*[float]' array subscript         prog.cpp:65: error: invalid types 'float*[float]' array subscript         prog.cpp:69: error: invalid types 'float*[float]' array subscript          compilation error    time: 0 memory: 0 signal:0         prog.cpp:15: error: integer constant large 'long' type         prog.cpp:22: error: integer constant large 'long' type         prog.cpp: in function 'float min(float*, float)':         prog.cpp:17: error: invalid types 'float*[float]' array subscript         prog.cpp:18: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'float max(float*, float)':         prog.cpp:24: error: invalid types 'float*[float]' array subscript         prog.cpp:25: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'float sum(float*, float)':         prog.cpp:32: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'int main()':         prog.cpp:40: error: expression in new-declarator must have integral or enumeration type         prog.cpp:41: error: expression in new-declarator must have integral or enumeration type         prog.cpp:42: error: expression in new-declarator must have integral or enumeration type         prog.cpp:43: error: expression in new-declarator must have integral or enumeration type         prog.cpp:45: error: 'i' not declared in scope         prog.cpp:48: error: invalid types 'float*[float]' array subscript         prog.cpp:50: error: invalid types 'float*[float]' array subscript         prog.cpp:51: error: invalid types 'float*[float]' array subscript         prog.cpp:53: error: invalid types 'float*[float]' array subscript         prog.cpp:53: error: invalid types 'float*[float]' array subscript         prog.cpp:54: error: invalid types 'float*[float]' array subscript         prog.cpp:54: error: invalid types 'float*[float]' array subscript         prog.cpp:56: error: invalid types 'float*[float]' array subscript         prog.cpp:58: error: invalid types 'float*[float]' array subscript         prog.cpp:59: error: invalid types 'float*[float]' array subscript         prog.cpp:59: error: invalid types 'float*[float]' array subscript         prog.cpp:59: error: invalid types 'float*[float]' array subscript         prog.cpp:59: error: invalid types 'float*[float]' array subscript         prog.cpp:62: error: invalid types 'float*[float]' array subscript         prog.cpp:62: error: invalid types 'float*[float]' array subscript         prog.cpp:63: error: invalid types 'float*[float]' array subscript         prog.cpp:67: error: invalid types 'float*[float]' array subscript          compilation error    time: 0 memory: 0 signal:0         prog.cpp:15: error: integer constant large 'long' type         prog.cpp:22: error: integer constant large 'long' type         prog.cpp: in function 'float min(float*, float)':         prog.cpp:17: error: invalid types 'float*[float]' array subscript         prog.cpp:18: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'float max(float*, float)':         prog.cpp:24: error: invalid types 'float*[float]' array subscript         prog.cpp:25: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'float sum(float*, float)':         prog.cpp:32: error: invalid types 'float*[float]' array subscript         prog.cpp: in function 'int main()':         prog.cpp:40: error: expression in new-declarator must have integral or enumeration type         prog.cpp:41: error: expression in new-declarator must have integral or enumeration type         prog.cpp:42: error: expression in new-declarator must have integral or enumeration type         prog.cpp:43: error: expression in new-declarator must have integral or enumeration type         prog.cpp:45: error: 'i' not declared in scope         prog.cpp:48: error: invalid types 'float*[float]' array subscript         prog.cpp:50: error: invalid types 'float*[float]' array subscript         prog.cpp:51: error: invalid types 'float*[float]' array subscript         prog.cpp:53: error: invalid types 'float*[float]' array subscript         prog.cpp:53: error: invalid types 'float*[float]' array subscript         prog.cpp:54: error: invalid types 'float*[float]' array subscript         prog.cpp:54: error: invalid types 'float*[float]' array subscript         prog.cpp:56: error: invalid types 'float*[float]' array subscript         prog.cpp:58: error: invalid types 'float*[float]' array subscript         prog.cpp:59: error: invalid types 'float*[float]' array subscript         prog.cpp:59: error: invalid types 'float*[float]' array subscript         prog.cpp:59: error: invalid types 'float*[float]' array subscript         prog.cpp:59: error: invalid types 'float*[float]' array subscript         prog.cpp:62: error: invalid types 'float*[float]' array subscript         prog.cpp:62: error: invalid types 'float*[float]' array subscript         prog.cpp:63: error: invalid operands of types 'float' , 'float*' binary 'operator=='         prog.cpp:67: error: invalid types 'float*[float]' array subscript 

1. you cannot use float in array subscript (the part within square brackets). try using int instead.

2. scanf takes pointer second (and subsequent) arguments. replace scanf("%d", t) scanf("%d",&t). better still, use cin >> t, since you're using c++.