Compilare: main.cpp:27:34: warning: multi-character character constant [-Wmultichar] while(c!='+'&&c!='-'&&c!='/n'&&ok!=1){ ^~~~ main.cpp: In function 'int main()': main.cpp:33:51: warning: suggest parentheses around '&&' within '||' [-Wparentheses] else if(c=='x'||c=='y'||c=='z'||c=='t'&&ok==0){ ~~~~~~^~~~~~~ main.cpp:57:35: warning: suggest parentheses around '&&' within '||' [-Wparentheses] else if(c=='+'||c=='-'&&ok==0){ ~~~~~~^~~~~~~ main.cpp:6:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("eq4.in","r",stdin); ^ main.cpp:7:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("eq4.out","w",stdout); ^ main.cpp:10:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%c",&cz,&c); ^ main.cpp:11:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^ main.cpp:26:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^ main.cpp:31:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^ main.cpp:55:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^ main.cpp:60:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^ main.cpp:71:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&a,&b,&e); ^ main.cpp:109:34: warning: 'p2' may be used uninitialized in this function [-Wmaybe-uninitialized] if(v[p1]==g&&v[p2]==g) ~~~~^ main.cpp:110:32: warning: 'p1' may be used uninitialized in this function [-Wmaybe-uninitialized] pos=pos+(p2-p1+1); ~~^~~