Language: C

main(){float e;int d[4][2]={0},i;for(i=0;~scanf("%f",&e);i^=1)e>1.0?d[0][i]++:e>0.5?d[1][i]++:e>0.2?d[2][i]++:d[3][i]++;for(i=0;i<4;i++)printf("%d %d\n",d[i][0],d[i][1]);exit(0)}

Compiler output:
main.c:1:1: error: return type defaults to 'int' [-Wimplicit-int]
    1 | main(){float e;int d[4][2]={0},i;for(i=0;~scanf("%f",&e);i^=1)e>1.0?d[0][i]++:e>0.5?d[1][i]++:e>0.2?d[2][i]++:d[3][i]++;for(i=0;i<4;i++)printf("%d %d\n",d[i][0],d[i][1]);exit(0)}
      | ^~~~
main.c: In function 'main':
main.c:1:43: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    1 | main(){float e;int d[4][2]={0},i;for(i=0;~scanf("%f",&e);i^=1)e>1.0?d[0][i]++:e>0.5?d[1][i]++:e>0.2?d[2][i]++:d[3][i]++;for(i=0;i<4;i++)printf("%d %d\n",d[i][0],d[i][1]);exit(0)}
      |                                           ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | main(){float e;int d[4][2]={0},i;for(i=0;~scanf("%f",&e);i^=1)e>1.0?d[0][i]++:e>0.5?d[1][i]++:e>0.2?d[2][i]++:d[3][i]++;for(i=0;i<4;i++)printf("%d %d\n",d[i][0],d[i][1]);exit(0)}
main.c:1:43: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    1 | main(){float e;int d[4][2]={0},i;for(i=0;~scanf("%f",&e);i^=1)e>1.0?d[0][i]++:e>0.5?d[1][i]++:e>0.2?d[2][i]++:d[3][i]++;for(i=0;i<4;i++)printf("%d %d\n",d[i][0],d[i][1]);exit(0)}
      |                                           ^~~~~
main.c:1:43: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:1:137: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    1 | main(){float e;int d[4][2]={0},i;for(i=0;~scanf("%f",&e);i^=1)e>1.0?d[0][i]++:e>0.5?d[1][i]++:e>0.2?d[2][i]++:d[3][i]++;for(i=0;i<4;i++)printf("%d %d\n",d[i][0],d[i][1]);exit(0)}
      |                                                                                                                                         ^~~~~~
main.c:1:137: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:137: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:1:137: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:171: error: implicit declaration of function 'exit' [-Wimplicit-function-declaration]
    1 | main(){float e;int d[4][2]={0},i;for(i=0;~scanf("%f",&e);i^=1)e>1.0?d[0][i]++:e>0.5?d[1][i]++:e>0.2?d[2][i]++:d[3][i]++;for(i=0;i<4;i++)printf("%d %d\n",d[i][0],d[i][1]);exit(0)}
      |                                                                                                                                                                           ^~~~
main.c:1:1: note: include '<stdlib.h>' or provide a declaration of 'exit'
  +++ |+#include <stdlib.h>
    1 | main(){float e;int d[4][2]={0},i;for(i=0;~scanf("%f",&e);i^=1)e>1.0?d[0][i]++:e>0.5?d[1][i]++:e>0.2?d[2][i]++:d[3][i]++;for(i=0;i<4;i++)printf("%d %d\n",d[i][0],d[i][1]);exit(0)}
main.c:1:171: warning: incompatible implicit declaration of built-in function 'exit' [-Wbuiltin-declaration-mismatch]
    1 | main(){float e;int d[4][2]={0},i;for(i=0;~scanf("%f",&e);i^=1)e>1.0?d[0][i]++:e>0.5?d[1][i]++:e>0.2?d[2][i]++:d[3][i]++;for(i=0;i<4;i++)printf("%d %d\n",d[i][0],d[i][1]);exit(0)}
      |                                                                                                                                                                           ^~~~
main.c:1:171: note: include '<stdlib.h>' or provide a declaration of 'exit'
main.c:1:178: error: expected ';' before '}' token
    1 | main(){float e;int d[4][2]={0},i;for(i=0;~scanf("%f",&e);i^=1)e>1.0?d[0][i]++:e>0.5?d[1][i]++:e>0.2?d[2][i]++:d[3][i]++;for(i=0;i<4;i++)printf("%d %d\n",d[i][0],d[i][1]);exit(0)}
      |                                                                                                                                                                                  ^
      |                                                                                                                                                                                  ;