Language: C

#include <stdio.h>

int area(int d) {
    
     n = 600/d ;
　　for (i=1; i <= n; i++){
　　    x = i*d;
　　    y = x*x;
　　    s= y*d;
　　    
　　    area(d)+=s;
　　}
　　
　
　　       
}

int main(void){
    int d;
    while(scanf("%d", &d) != EOF) {
       printf("%d\n", area(d));
    }
    return 0;
}
#include <stdio.h>

int area(int d) {
    
    int i=0,n,x,y,s,sum=0;
    
     n = 600/d ;
　　for (i=0; i < n; i++){
　　    x = i*d;
　　    y = x*x;
　　    s= y*d;
　　    
　　    sum=sum+s;
　　}
　　return sum;
　
　　       
}



Compiler output:
main.c: In function 'area':
main.c:5:6: error: 'n' undeclared (first use in this function)
    5 |      n = 600/d ;
      |      ^
main.c:5:6: note: each undeclared identifier is reported only once for each function it appears in
main.c:6:1: error: stray '\343' in program
    6 | <U+3000><U+3000>for (i=1; i <= n; i++){
      | ^~~~~~~~
main.c:6:3: error: stray '\343' in program
    6 | <U+3000><U+3000>for (i=1; i <= n; i++){
      |         ^~~~~~~~
main.c:6:10: error: 'i' undeclared (first use in this function)
    6 | 　　for (i=1; i <= n; i++){
      |          ^
main.c:7:1: error: stray '\343' in program
    7 | <U+3000><U+3000>    x = i*d;
      | ^~~~~~~~
main.c:7:3: error: stray '\343' in program
    7 | <U+3000><U+3000>    x = i*d;
      |         ^~~~~~~~
main.c:7:9: error: 'x' undeclared (first use in this function)
    7 | 　　    x = i*d;
      |         ^
main.c:8:1: error: stray '\343' in program
    8 | <U+3000><U+3000>    y = x*x;
      | ^~~~~~~~
main.c:8:3: error: stray '\343' in program
    8 | <U+3000><U+3000>    y = x*x;
      |         ^~~~~~~~
main.c:8:9: error: 'y' undeclared (first use in this function)
    8 | 　　    y = x*x;
      |         ^
main.c:9:1: error: stray '\343' in program
    9 | <U+3000><U+3000>    s= y*d;
      | ^~~~~~~~
main.c:9:3: error: stray '\343' in program
    9 | <U+3000><U+3000>    s= y*d;
      |         ^~~~~~~~
main.c:9:9: error: 's' undeclared (first use in this function)
    9 | 　　    s= y*d;
      |         ^
main.c:10:1: error: stray '\343' in program
   10 | <U+3000><U+3000>
      | ^~~~~~~~
main.c:10:3: error: stray '\343' in program
   10 | <U+3000><U+3000>
      |         ^~~~~~~~
main.c:11:1: error: stray '\343' in program
   11 | <U+3000><U+3000>    area(d)+=s;
      | ^~~~~~~~
main.c:11:3: error: stray '\343' in program
   11 | <U+3000><U+3000>    area(d)+=s;
      |         ^~~~~~~~
main.c:12:1: error: stray '\343' in program
   12 | <U+3000><U+3000>}
      | ^~~~~~~~
main.c:12:3: error: stray '\343' in program
   12 | <U+3000><U+3000>}
      |         ^~~~~~~~
main.c:13:1: error: stray '\343' in program
   13 | <U+3000><U+3000>
      | ^~~~~~~~
main.c:13:3: error: stray '\343' in program
   13 | <U+3000><U+3000>
      |         ^~~~~~~~
main.c:14:1: error: stray '\343' in program
   14 | <U+3000>
      | ^~~~~~~~
main.c:15:1: error: stray '\343' in program
   15 | <U+3000><U+3000>
      | ^~~~~~~~
main.c:15:3: error: stray '\343' in program
   15 | <U+3000><U+3000>
      |         ^~~~~~~~
main.c: At top level:
main.c:27:5: error: redefinition of 'area'
   27 | int area(int d) {
      |     ^~~~
main.c:3:5: note: previous definition of 'area' with type 'int(int)'
    3 | int area(int d) {
      |     ^~~~
main.c: In function 'area':
main.c:32:1: error: stray '\343' in program
   32 | <U+3000><U+3000>for (i=0; i < n; i++){
      | ^~~~~~~~
main.c:32:3: error: stray '\343' in program
   32 | <U+3000><U+3000>for (i=0; i < n; i++){
      |         ^~~~~~~~
main.c:33:1: error: stray '\343' in program
   33 | <U+3000><U+3000>    x = i*d;
      | ^~~~~~~~
main.c:33:3: error: stray '\343' in program
   33 | <U+3000><U+3000>    x = i*d;
      |         ^~~~~~~~
main.c:34:1: error: stray '\343' in program
   34 | <U+3000><U+3000>    y = x*x;
      | ^~~~~~~~
main.c:34:3: error: stray '\343' in program
   34 | <U+3000><U+3000>    y = x*x;
      |         ^~~~~~~~
main.c:35:1: error: stray '\343' in program
   35 | <U+3000><U+3000>    s= y*d;
      | ^~~~~~~~
main.c:35:3: error: stray '\343' in program
   35 | <U+3000><U+3000>    s= y*d;
      |         ^~~~~~~~
main.c:36:1: error: stray '\343' in program
   36 | <U+3000><U+3000>
      | ^~~~~~~~
main.c:36:3: error: stray '\343' in program
   36 | <U+3000><U+3000>
      |         ^~~~~~~~
main.c:37:1: error: stray '\343' in program
   37 | <U+3000><U+3000>    sum=sum+s;
      | ^~~~~~~~
main.c:37:3: error: stray '\343' in program
   37 | <U+3000><U+3000>    sum=sum+s;
      |         ^~~~~~~~
main.c:38:1: error: stray '\343' in program
   38 | <U+3000><U+3000>}
      | ^~~~~~~~
main.c:38:3: error: stray '\343' in program
   38 | <U+3000><U+3000>}
      |         ^~~~~~~~
main.c:39:1: error: stray '\343' in program
   39 | <U+3000><U+3000>return sum;
      | ^~~~~~~~
main.c:39:3: error: stray '\343' in program
   39 | <U+3000><U+3000>return sum;
      |         ^~~~~~~~
main.c:40:1: error: stray '\343' in program
   40 | <U+3000>
      | ^~~~~~~~
main.c:41:1: error: stray '\343' in program
   41 | <U+3000><U+3000>
      | ^~~~~~~~
main.c:41:3: error: stray '\343' in program
   41 | <U+3000><U+3000>
      |         ^~~~~~~~